42100042 has 16 divisors (see below), whose sum is σ = 64008000. Its totient is φ = 20766240.

The previous prime is 42100039. The next prime is 42100061. The reversal of 42100042 is 24000124.

It is a junction number, because it is equal to n+sod(n) for n = 42099995 and 42100031.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54942 + ... + 55702.

It is an arithmetic number, because the mean of its divisors is an integer number (4000500).

Almost surely, 2^42100042 is an apocalyptic number.

42100042 is a deficient number, since it is larger than the sum of its proper divisors (21907958).

42100042 is a wasteful number, since it uses less digits than its factorization.

42100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42100042 is about 6488.4545155222. The cubic root of 42100042 is about 347.8784366438.

Adding to 42100042 its reverse (24000124), we get a palindrome (66100166).

The spelling of 42100042 in words is "forty-two million, one hundred thousand, forty-two".